Let the aux port use port number one (not zero), to match the AMD documentation and enable mapping ACPI _ADR to port number. This fixes ACPI-based enumeration of I2C slave peripherals that are defined for the aux SMBus port. Signed-off-by: Andrew Cooks <andrew.cooks@xxxxxxxxxxxx> --- drivers/i2c/busses/i2c-piix4.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c index 9260cfa..f980f0b 100644 --- a/drivers/i2c/busses/i2c-piix4.c +++ b/drivers/i2c/busses/i2c-piix4.c @@ -975,7 +975,7 @@ static int piix4_probe(struct pci_dev *dev, const struct pci_device_id *id) if (retval > 0) { /* Try to add the aux adapter if it exists, * piix4_add_adapter will clean up if this fails */ - piix4_add_adapter(dev, retval, false, 0, false, + piix4_add_adapter(dev, retval, false, 1, false, is_sb800 ? piix4_aux_port_name_sb800 : "", &piix4_aux_adapter); } -- 2.7.4